Every 60 miles or so I get a P2209 and engine check. I cleaned the DEF injector but the code returned. Took it to the dealer who said they cancelled the code and it should be right to go. I was also told this could relate to DEF which is showing about a third but thought the code related to the NOx heater. Any advice or suggestions please.
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P2209 code - 6.7 Cummins
- Thread starter Nifty07
- Start date
PRS
Active Member
The code relates to the NOX sensors ability to maintain its heated value. The issue is strictly a function of sensor function. About the only thing that would affect it is flaky power or ground but that should likely set another NOX sensor code. I would separate the connector, clean the pins, ensure there are no pushed back pins, and reconnect. If it continues, consider replacing the sensor. The sensor and box are a paired unit so are replaced together.